On your next visit to a major U.S. city, fuel up at gleaming, brightly painted food truck. These vehicles sell a dinner or late-night snack of gourmet tacos, ice-cream cones, and other treats.

This trend had its moment of fame this winter when millions watched The Great Food Truck Race on the Food Network, with a couple of Los Angeles food trucks battled it out for bragging rights.

In real life, the trend is national. There are gourmet food trucks in Seattle, Portland, New York, Austin, Miami, Chicago, and other major cities.

Yet the best trucks, carts, and buses are always on the move. How to find them?

Use the following tracking tools, which will put those ever-moving burritos and other tasty treats a click or a finger swipe away. None are perfectly accurate, though, as food trucks go in and out of business and none I've heard of have GPS devices broadcasting their location to these services.